Knitting-loom.



T. BRANSON.

KNITTING LOOM.

APPLICATION FILED SEPT. 1a. 1915 1,245,563. Patented Nov. 6, 1917.-

I Thomas Brar n, v Wi'mmws vg ma THOMAS BRANSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO SIBSON' &

STERN, INQ, 0F GERMANTOWN, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

KNITTING-LOOK.

Specification of Letters Patent.

Patented Nov. 6, ram.

To all whom it may concern:

Be it known that I, THOMAS BRANSON, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in KnittingLooms, whereof the following is a specification, reference being had to the accompanying drawings.

The invention relates to knitting looms wherein the knitting is effected through the reciprocation of a bank of needles cooperating with shiftable yarn guides in producing laces, etc.

The invention is more particularly directed to the means for effecting the reciprocation of the needle bank, and an object thereof is to afford an organization of the above character which will at all times be in a state of perfect equilibrium when the ma chine is stopped in any position whatever, so that a reversal of movement of any of its elements with a resulting pressing off of the knitted fabric is absolutely impossible.

A further object of the invention is to afford a reciprocating mechanism for the needle bar of a knitting loom whereby a comparatively long dwell is obtained at the end of each reciprocation, permit the shifting of the yarn guides, so the machine may be operated at greater speeds than heretofore possible.

In the accompanying drawings, Figure i, is an end elevation of a knitting loom illustrating only those parts which are essential in portraying the application of my invention thereto.

Fig. 11, is a partial detail sectional view along the line ll, ll, of Fig. I, through the wrist plate by which the needle bar is actuated.

In the drawings, an end frame of a well known type of knitting loom is represented at 1, of which there is an exact duplicate at the other end of the machine. These frames together with a series of cross bars, (not shown) constitute the supporting structure for the various moving parts of the machine.

The mechanism which is about to be described is also duplicated at the other end of the machine, but for convenience of illustration this duplication has been omitted in the drawings, the description will however serve for both.

A vertically reciprocating 11 bar 2,

is supported at each end of the machine upon a slide rod 3, which finds its guidance in a projection 5, of the end frame 1. The lower end of rod 3, is pivotally connected at 6, to a link 7, longitudinally adjustable by means of a screw device such as shown at 8. The other end of link 7, is in turn pivotally attached to a wrist plate 9, by means is a screw bolt 10, capable of radial adjustment in a slot 11, in said plate. This plate is mounted for oscillation upon a fixed stud 12, in the frame 1, and receives its motion through the rod 13, attached to the eccentric strap of an eccentric 15, fast upon a counter-shaft 16, which may be driven by any well known means. The pivot bolt 17, ofthe eccentric rod 13 (see Fig. I1), is also adjustably secured in a second radial slot 18, of the wrist plate.

The movement of the eccentric will thus be transmitted to the wrist plate which, through its oscillation, will in turn impart a reciprocatory motion to the needle bar. By reason of the various adjustments, this reciprocatory movement of the needle bar may be very accurately regulated to efiect thedesired results in the product of the machine.

It is to be noted that the location of the pivotal connection for the link 2 upon the wrist plate, is such that a dwell is obtained at the completion of each up-strolre of the needle bar and the time period thus afforded, is advantageous in permitting the shifting of the yarn feeds in a manner readily understood to those familiar with this art. It will thus be seen that av machine embodying my improvements can be operated at a very much higher rate of speed than has been heretofore possible without sacrificing the requisite time interval necessary for the shiftingof the yarn feeds. Furthermore, the elements'constituting my improvements are at all times in a state of perfect equilibrium so that no reverse movement of the shaft 17, due to weight of the needle bar is possible. Heretofore in machines of this type, the reciprocation of the needle bar was effected through cams mounted upon the countershaft. In stopping such a-machine in certain positions, the weight of the needle bar would cause a slight reverse rotation of the counter-shaft of sufficient magnitude to cause the work to be pressed off the needles, with a resulting loss of time and an imperfect prodproduce a compounded period of wrist plate, whereby the net, in a manner so well understood as to obviate any further description.

Having thus described my invention, I claim: l

1. In a knitting loom, the combination of a vertically reciprocating needle bank; oscillating means mounted below said needle bank; with the oscillating means, whereby the motion of oscillation is translated into reciprocation, said oscillating, means being mounted in such relation to said needle bank as to dwell when the needle bank is at its point of highest elevation.

2. In a knitting loom, the combination of a vertically reciprocating needle bank; a wrist plate mounted below said needle bank; eccentric connections for oscillating said wrist plate; a link connecting said needle bank to said wrist plate, whereby the oscillation of the wrist plate may be translated into reciprocation, said link being so connected to said wrist plate that the moment of minimum translation occurs simultaneously with the moment of change of oscillation when the needle bank is at its point of highest elevation, so that a compounded period of dwell is produced at that point.

3. In a knitting loom, the combination of a Vertically reciprocating needle bank; a wrist plate mounted below said needle bank; eccentric connections for oscillating said wrist plate; a link connected to said needle bank; means for connecting said link to said oscillation of the wrist plate may be translated into reciprocation; said connecting means lying in a line passing through the fulcrum of said wrist plate, and said needle bank when the needle bank is at its highest point of elevation.

4. In a knitting loom, the combination of a vertically reciprocating needle bank; a

wrist plate mounted below said needle bank; eccentric connections for oscillating said wrist plate; a link connected to said needle bank; means for connecting said link to said Wrist plate, whereby the oscillation of the wrist plate may be translated into reciprocation; said connecting means lying in a line passing through the fulcrum of said wrist plate and said needle bank, when means connecting the needle banlo the needle bank is at its highest point of elevation; and means for radially adjusting the connection between the link and the. wrist plate, whereby the extent of the reciprocation of the needle bank may be varied, without altering the alinement of the connecting m -ans when the needle bank is at its highest point of elevation.

In a knitting loom, the combination of a vertically reciprocating needle bank; a wrist plate mounted below said needle bank, said wrist plate being provided with paired radial slots; an eccentrically mounted rod; means for adpistably connecting said rod to one of said radial slots, whereby a motion of oscillation is transmitted to said wrist plate; a link connected to said needle bank; and means for adjustably connecting said link to the other of said radial slots, whereby the oscillation of the wrist plate is translated into reciprocation of the needle bank, the relation between said slots being such that the period of dwell is compounded when the needle bank is at its point of highest elevation.

(3. In a knitting loom, the combination of a Vertically reciprocating needle bank; a wrist plate mounted below said needle bank, said wrist plate being provided with paired radial slots; an eccentrically mounted rod; means for adjustably connectingsaid rod to one of said radial slots, whereby a motion of oscillation is transmitted to said wrist plate; a link connected to said needle bank; means for adjustably connecting said link to the other of said radial slots, whereby the oscillation of the wrist plate is translated into reciprocation of the needle bank, the relation between the slots being such that a compounded period of dwell is produced when the needle bank is at its point of highest elevation; and said wrist plate being mounted in such relationship to.said needle bank that said rod and link connections may be varied without affecting the period of dwell.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this twelfth day of September, 1916.

THOMAS BRANSON. Witnesses:

JAMES H. BELL, E. L. FULLERTON. 

